Communications: electrical – Condition responsive indicating system – With particular system function
Patent
1984-07-18
1986-11-11
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
With particular system function
340500, 340508, 340511, 340518, 340 19R, 340525, 340539, 187 29R, 364436, 364551, G08B 2900, B66B 300
Patent
active
046225382
ABSTRACT:
A plurality of different types of operating systems in buildings organized in geographical groups, each group having a local service office, are monitored at both the local offices and central office for the presence of performance conditions and conditions indicative of an alarm condition.
REFERENCES:
patent: 3665399 (1972-05-01), Zehr et al.
patent: 3676878 (1972-07-01), Linder
patent: 3925763 (1975-12-01), Wadhwani et al.
patent: 4222041 (1980-09-01), Von Tomkewitsch et al.
patent: 4414539 (1983-11-01), Armer
patent: 4523183 (1985-06-01), Frick
Hall Robert E.
Whynacht Charles
Crosland Donnie L.
Maguire, Jr. Francis J.
Otis Elevator Company
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